Engine-frame.



C. N. SCOTT. ENGINE FRAME. APPLICATION FILED JAN. 6.1909.

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CLARENCE N. SCOTT, OF BUFFALO, NEW YORK, ASSIGNOR TO INTERNATIONALSTEAMPUMP COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

ENGINE-FRAME.

To all whom t may concern:

' Be it known that I, CLARENCE N. SCOTT, a subject of the King of GreatBritain, residing' at Buffalo, county of Erie, State of New York, haveinvented certain new and useful Improvements in Engine-Frames, fullydescribed and represented in the following specification and theaccompanying drawings, forming a part of the same.

In large engines of those types having a cross head frame next that endof the engine cylinder at which the engine piston must be removed, andespecially in engines in .which the piston and piston rod are intergalor the piston is permanently secured to the rod so that the piston androd must be removed together', the removal of the piston from the framehas been an inconvenient and expensive operation. This is especiallytrue in large tandem gas engines as now built, with the cross headbetween the inboard end of the inner cylinder and the crank shaft, thepresent practice being to remove the cross head from the pitman, and thecrank and pitman from the crank shaft, and then draw the engine pistonand rod back through the frame and block it up to clear the crank shaft,before raising it out of the frame by a sling. This takes time andlabor, as well as care and skill in connecting and disconnecting thecross head, pitman, crank, and crank shaft and blocking up the pistonrod so as to be safely supported.

The present invention provides a conw struction byy which the piston andpiston rod, as well as the cylinder head and cross head, may readily andconveniently be removed from the frame by the block and tackle, withoutdisconnecting the cross head, pitman, crank, and crank shaft. Thisresult is secured by providing the engine frame inclosing the cross headand carrying the upper and lower cross head guides with an opening atthe top of suflicient width to permit the piston, cylinder head, andcross head to pass through it, and removably securing in this openingthe upper cross head guide. By removing the upper cross head guide,therefore, and unkeying the piston rod from the'cross head, the crosshead 'may be raised from the frame and swung back on the crank out ofthe way, and the cylinder head and piston then removed readilySpecification of Letters Patent.

Application led January 6, 1909.

Patented Feb. 114i, 1911.

Serial No. 470,911.

and conveniently through the cross head guide opening.

In the accompanying drawings I have shown for illustration of theinvention a horizontal tandem gas engine embodying the invention in itspreferred form, and the invention will now bedescribed in detail inconnection with this construction and the features forming the inventionspecifically pointed out in the claims.

In the drawings :mligure 1 is a side elevation of the engine with theinner cylinder, frame and cross head guides sectioned to show theconstruction. Fig. 2 is a similar view, omitting the outer cylinder andshowing the upper cross head guide removed and the piston rod, cylinderhead and cross head detached for removal. Fig. 3 is a view similar toFig. 2 showing the construction after removal of the cross head andcylinder head, and with the piston and its rod on the sling and beinglifted. Fig. a is a cross section on an enlarged scale on line t of Fig.1.

In the drawings, A, B, are the outer and inner engine cylinders, a, Z)the corresponding pistons which are formed integral with or permanentlysecured to their respective rods c, cZ.'

C is the engine frame in which moves the cross head e connected by thepitman g to the crank on the crank shaft D. The rods c, CZ are securedtogether by the coupling piece or cross head 10 to which the rods arekeyed by keys 1, and the inner end of the piston rod Z is keyed by key 1to the cross head e. The engine cylinders have removable heads L. Thecross head e runs on upper and lower cross head guides 11, 12 supportedin the engine frame and fitting the cross head.4

The construction thus far described is the same as engines heretoforebuilt, and may be of any other suitable form.

Referring now to the especial features of the present invention, theframe C, instead of being permanently closed at the top, is open at thetop so as to permit the withdrawal of the cross head guide, cylinderhead and piston through the opening, and this opening is closed by aframe portion 13 carrying the cross head guide 11, the cross head guideand its support thus being removable to open the top of the engine framewhen the piston is to be removed,

The cross head guide support 13 may be secured in place by any suitab-lemeans, the means shown consisting of through bolts 2 passing through theside walls of the traine and the support 13 and top bolts 3 passingthrough ears on the support 13 and into the side wallsof the frame, astrong rigid frame and cross head guide construction being thus secured.

The operation of the construction will be understood from a briefdescription in connection with the drawings.

In the operation of the engine, the parts are as shown in Fig. 1, withthe upper cross head guide and its support 13 in place. When the pistonb and its rod cl are to be withdrawn, the rod Z is unkeyed from thecoupling piece or cross head 10 and the cross head e, and the innercylinder head Withdrawn from the piston rod into the frame C, and theupper cross head and its support 13 removed to open the top of the:frame7 as shownV in Fig. 2. The cross head e and cylinder head L maynow be removed by lifting them out of the engine frame by the sling andthe cross head guide and pitman swung back out of the way, he cross headconveniently being blocked up behind the engine, as shown, and thepiston b and K its rod al may then be drawn back into the framesufficiently for the outer end of the rod to clear the engine cylinderin lifting, and the piston and rod then raised out of the frame by thesling all as shown in Fig. 3.

What is claimed.

1. The combination with a horizontal engine cylinder, its piston andpiston rod, an engine frame at the end of the cylinder, a cross headmoving in the frame, a' crank shaft having a pitman connected to saidcross head, and a cylinder head removable from the cylinder into lsaidtrame, said trame having an openingat the top of such size head forremoval with the piston, a cylinder head at the inner end of the innercylinder removable into theframe, upper and lower cross head guides insaid frame, and a removable top lframe section carrying the upper crosshead guide and of such size as to provide by its removal an openingthrough which the cross head guide, cylinder head and piston may belifted out of the frame.

In testimony whereof I have hereunto se' my hand in the presence of twosubscribing witnesses.

SAMUEL B. DAUGHERTY, J. IVI. O. BUNGE.

